Stitch-forming mechanism for sewing machines



Jan. 12, 1932. EAMES 1,840,571

STITCH FORMING MECHANISM FOR SEWING MACHINES Filed Nov. 9, 1928 3Sheets-Sheet 1 Jim. 12, 1.932.

G. EAMEs STITCH FORMING MECHANISM FOR SEWING MACHINES- Filed Nov. 9,1928 SSheetS-Sheet 2 gwwmtoz Jan. 12, 1932. e. M. EAMES STITCH FORIINGMECHANISM FOR'SEWING MACHINES Filed Nov. 9, 1928 3 Sheets-Sheet 3 3 W41401, 6205 MEaI/zes 99mm I Patented Jan. 12, 1932 UNITED STATES PATENTOFFICE GEORGE 1L ELIE-8, OF BBIDGEPOBT, CONNECTICUT, ASSIGNOR TO THESINGER MANU- FAGTUIRING- COMPANY, OF ELIZABETH, NEW JERSEY, ACORPORATION OF NEW JERSEY STITCH-FORMING MECHANISM: FOR SEWING MACHINESApplication filed November 9, 1928. Serial No. 318,174.

This invention relates to improvements in sewing machines adapted moreparticularly for embroidering and has for its object to provide animproved actuating mechanism for the stitch-forming elements of machinesof this type.

In a preferred embodiment of the invention, the needle-carrying bar isjournaled for endwise reciprocation in a laterally swinging frame whichis suitably connected with a crank-arm upon the forward end of aneedle-vibrating rock-shaft ournaled lengthwise in the usual overhangingbracket-arm of a sewing machine. This rock-shaft carries anothercrank-arm connected by means of a link with a lever disposed within andfulcrumed upon the bracket-arm standard. Pivotally connected to saidlever is a" pitman-bar havin a fork straddling a rotatable cam suitab ytimed to impart to said pitman-bar uniform lateral movements about itspivot of which one in each direction is eifected for every completereciprocation of the needle. Pivotally connected to the pitman-bar is alink which is fulcrumed upon the crank-arm of a short rock-shafteccentrically journaled in a bushing which is adjustably secured uponthe machine bracketarm. By means of suitable treadle connections, thelink fulcrum may be swung in opposite directions transversely of thepitman-bar into positions wherein lateral move ments of the pitman-barare resolved into endwise movements thereof, said endwise movements ofthe pitman-bar being transmitted to the needle-vibrating rock-shaftthrough the described connections.

The link-fulcrum carrying shaft is limited in its rocking movements byadjustable stops, whereby the extent of lateral vibration of the needlemay be definitely determined under treadle control. Means are alsoprovided for securing the link-fulcrum in a predetermined positionadjustably selected according to the extent or absence of vibration ofthe needle, as may be desired. By adjustment of the bushing whichaffords the eccentric journal for the link-fulcrum rock-shaft, the fieldof vibration of the needle may be changed, means being provided forobtaining the main actuating shaft 8, carrying at one 100 the endwisemovements of the pitman-bar are transmitted to a sleeve shiftableendwise upon and rotatable with the loop-taker carrying shaft, which isfixed against endwise movement. This sleeve carries a spiral gear inmesh with a similar driving gear therefor, the endwise movements of thesleeve carrying the driven gear across the face of its driving gear andthereby eflecting the required acceleration and retardation of theloop-taker.

In the accompanying drawings, Fig. 1 is a longitudinal section of asewing machine embodying the present improvements. Fi 2 is a sectionalView substantially on the Tine 2-2 of Fig. 1. Fig. 3 is a bottom planview of the sewing machine. Fig. i is a longitudinal section of thepresser bar of the machine. Fig. 5 is a perspective view of apresserfoot employed for eyeleting. Fig. 6 is a perspective view of aspur throatlate employed for eyeleting. Fig. 7 is a ace view of theneedle-throw adjusting device. Fig. 8 is a detail sectional view of oneof the stops of said adjusting device. Fig. 9 isa bottom plan view ofthe detachable parts of the cloth-plate, including the throat-plate andslide-plate. Fig. 10 is a sectional view sub stantially on the line10-10 of Fig. 9.

Referring to the drawings, the sewing machine comprises a cloth-plate 1,from which rises the hollow standard 2 of a tubular, overhangingbracket-arm 3, which terminates at its free end in a head 4. The frontside of the bracket-arm standard 2 is formed with an enlarged openingclosed by a detachable cover-plate 5 to provide for ready access to themechanism within the bracket-arm, the top of the bracket-arm and thefree end thereof being as usual, provided with the coverplate 6 and theface-plate 7.

Suitably journaled in the bracket-arm 3 is end the combinedbalance-wheel and belt= pulley 9. At its opposite end, the shaft 8carries a crank-disk 10, in which is secured a crank-pin 11 connected bymeans of a link 12 with a pin 13 extending laterally from a collar 14rigidly clamped upon a needle-bar 15. The needle-bar 15 is journaled forendwlse reciprocation in vertically alined apertures provided inspacedbearinglugs 16 and 17. upon a vibratory frame 18, journaled at its upperend upon a fulcrum-pin for swinging move; ments in directionssubstantiaily transverse to the axis of rotation of the shaft 8, i. e.,substantially transverse to the longitudinal direction of thecloth-plate 1. The fulcrumpin 19 has a reduced extension 26 which iseccentric to the j ournal-axis of the frame 18 and is adjustably securedwithin a split bushing 21 in an aperture in the head 4, by means of ascrew 22. At its lower end, the needle-bar 15 carries a needle 23.

Journaled for vertically directed movements in the head 4 is a tubularpresser-bar 24, guided at its upper end within a bushing 25 adjustablythreaded into the machine head and at its lower end by a bushing 26fixed in said head. Interposed between the lower end of the bushing 25and a collar 27 secured upon the presser-bar is a coil-spring 28, whichfunctions to depress the presser-bar with a pressure determined byadjustment of the bushing 25. The downward movement of the presser-barmay be adj ustably limited by a collar 29 suitably secured upon thepresserbar and having a lateral extension 31 overlying the cam portionof a manually operated lifter lever 32 suitably fulcrumed upon the rearside of the head 4.

, The presser-feet employed vary in accordance with different kinds ofwork produced by the machine. For instance in eyeleting, thework-engaging portion of the presserfoot employed conforms with the sizeof the eyelets to be roduced and the eyeleting presser-feet di er fromthe type employed for fiat stitch embroidering. Therefore means areprovided for interchangeably securing the required different kinds ofpresserfeet to the resser-bar with great facility.

To this end, it is preferred to employ presser-foot securing meanssubstantially as disclosed in the prior U. S. patent to WV. Myers, No.1,135,959, April 13, 1915. This securing means comprises, in general, aclam -rod 33 disposed lengthwise within the tubu ar resser-bar 24. Thisclamp-rod 33 is threaded at its upper end to receive a thumbnut 34overlying the upper end of the presser-bar and at its lower end has aclamp-head 35 adapted to clamp the shank of a presserfoot against thelower end of the resser-bar. To accommodate this securing means, thePresser-feet, as 36, employed are preferably constructed substantiallyas disclosed in said prior Patent No. 1,135,959, with the needleslots,as 37, extending in the direction of the length of the tread portion ofeach foot, instead of crosswise thereof, to correspond with thedirection of vibration of the needle in the present machine.

Likewise, the throat-plates employed are constructed substantially likethe throatplates disclosed in said Patent No. 1,135,959,

ig. 6 of the present drawings illustrating an eyeleting throat-plateprovided with the spur 38, and Figs. 1, 9 and 14) the llat-facedthroatplate employed for progressive cmbroidering. Each of thesethroat-plates, whether for eyeleting or progressive embroidering,comprises a circular plate 39 having its margin extending beyond acentrally disposed depending hub 40, whereby the margin of the plate 39constitutes in effect a flange. The hub 40 is provided, as before, witha peripheral groove 41. In the present instance, the throat-plate issustained by a supporting plate 42 secured upon the machine cloth-plateby screws (not shown) passing through supporting-plate apertures, as 43.The supporting-plate 42 is provided in its upper face with a recessedseat 44 for the throat-plate flange and with a central aperture 45 toreceive the throat-plate hub which extends below the recessed lower face46' of the supporting plate. The supporting-plate 42 terminates in astraight edge 47 directly adjacent to the throat-plate, and adapted toabut against said edge 47 is the end of a retractible slide-plate 48,disposed in a suitable guideway in the upper face of the cloth-plate 1and yieldingly held in position by the usual slide-plate spring 49engaging the under side of the cloth-plate.

In order to position the throat-plate upon the supporting plate 42 todefinitely aline the needle-slot 50 thereof with the direction ofneedle-vibration, the supporting plate is provided with a locating pin51 adapted to enter the needle-slot of an eyeleting throat-plate and toenter a notch 52 formed in the periphery of a fiat-faced throat-plate.After a throat-plate has been correctly positioned upon its supportingplate, it is locked in this position by a latch-plate 53 secured byscrews, as 54 upon the under side of the slide-plate 48, saidlatch-plate having a bifurcated extension 55 disposed to slide on theface 46 of the supporting plate and to enter the peripheral groove 41 ofthe throat-plate hub. The present throat-plate securing means thereforenot only provides for readily interchanging throat-plat-es, but alsopermits of access to the loop-taker below the throatplate in theaccustomed manner of merely retracting the usual slide-plate and withoutrequiring removal of the throat-plate supporting plate.

Fixed upon the main shaft 8 is a bevelar 56 in mesh with a similar gear57 of one alf the size of its driving gear and carried by the upper endof a connecting shaft 58. The shaft 58 is journaled in suitable bearingsprovided within the standard 2 so as to be disposed slightly inclined toa vertical line and carries at its lower end a spiral-gear 59 in meshwith a spiral-gear 60 upon the rearward end of a primary sleeve 61. Thesleeve 61 is journaled for rotation and endwise reciprocation in abushing 62 secured by means of a set screw 63 in an apertured lug 64depending from the cloth-plate 1. Secured upon the sleeve 61 are spacedcollars 65 and 66 confining a shifting sleeve 67 loosely disposed uponthe primary sleeve 6'1 and carrying a laterally extending pin 68.

roj ecting from the collar 66 are the spaced driving keys, as 69,slidingly fitted into a ooved collar 70 secured upon a loop-taker shaft71. The shaft 71 is journaled at its rearward end within the primarysleeve 61 and at its forward end in a bushing 72 fixed in a suitablyapertured lug 73 depending from the cloth-plate 1. The shaft 71 is heldagainst endwise movement by a collar 74 fixed upon said shaft at one endof the bushing 72 and by the hub of a loop-taker 75 secured upon theshaft at the other end of said bushing. The loop-taker 75 is in thepresent instance of the rotary hook type, carrying a mass of underthread around which the needle-thread loops are cast in the formation oflock-stitches.

For the purpose of laterally vibrating the needle, the inner face of theneedle-bar frame bearing-lug 17 is grooved to receive a slideblock 76suitably connected with a crank-arm 77 upon the forward end of arock-shaft 78, journaled in bearing apertures provided in thebracket-arm 8 below and substantially parallel to the main-shaft 8.Clamped upon the rearward end of said rock-shaft is the split hub 79 ofa crank-arm 80 pivotally connected with the upper end of a link 81 ofwhich the lower end is joined in like manner to one arm of a two-armedlever 82. The lever 82 is journaled upon an eccentric fulcrum-pin 83disposed substantially parallel with the rockshaft 78 and adjustablysecured upon the standard 2 primarily for facilitating in obtainingcorrect positioning of the parts. The lever 82 is therefore supportedfor rocking movements upon an axis transverse to the path of needleendwise reciprocation. The other arm of said lever 82 is pivotallyconnected with the lower end of a pitman-bar 84: having at its upper enda fork 85 straddling a triangular cam 86.

The cam 86 is secured by a screw 87 upon the side of a gear-wheel 88driven by a gear- Wheel 89, fixed upon the main shaft 8 and preferablyintegral with the securing hub of the bevel-gear 56. The gear-wheel 88is journaled upon a fulcrum-shaft 9O suitably fixed in an aperture inthe standard 2, said gear-wheel 88 being held against sidewise movementin a direction away from-the frame 2, by means of a collar 91 securedupon the end of the fulcrum-shaft 90.

Directly below its fork, the pitman-bar 84 carries a pivot-pin 92,secured by an elongated screw 93 and projecting from opposite sides ofthe pitman-bar. Pivotally supported by said pivot-pin 92 is a bifurcatedlink 94 of which the spaced members are disposed upon opposite sides ofthe pitman-bar, the lower end of said link receiving a pivot-bolt 96,secured uponthe free end of a depending lever-arm 97' and constitutingthe fulcrum of the pitman-bar 84. The hub of the leverarm 97 is fixedupon a short rock-shaft 98, disposed substantially parallel to therockshaft 78 and eccentrically journaled in a bushing 99 rotatablyadjustable in a suitable aperture in the standard 2, said bushing beingsecured in adjusted position, as by means of a screw 100. The provisionof a link connection with opposite sides of the pitman-bar 84, as bymeans of the bifurcated link '94, obviates any tendency toward crampingof the parts.

Preferably integral with the bushing 99 is a segment-plate 101 disposedat the outside of the sandard 2 and partly under the bracket-arm 3. Thissegment-plate 101 is provided with a segmental If-shaped slot 102 inwhich is slidingly disposed an adjustable stop compris ng a headed pin103 having a threaded shank receiving a stop-nut 104 between which andthe segment-plate 101 is disposed a washer 105. Adjustably disposed uponthe segment-plate is a second stop 106 corresponding in structure to thedescribed stop. Upon the outer end of the rock-shaft 98 is secured thehub 107 of an arm 108 carrying at its overhanging free end a securingscrew 109 adapted to engage the periphery of the segment-plate 101 tothereby provide for adjust-ably securing the rock-shaft 98 againstmovement.

When the screw 109 is released from engagement with the segment-plate101, the fulcrum 96 of the pitman-bar is free to be swung about the axisof the rock-shaft 98 in directions substantially transverse to the axisof the needle-vibrating rock-shaft 78. To provide for readily shiftingsaid fulcrum 96 during the operation of the machine, the lever-arm 97 isconstructed as one arm of a bell-crank lever, of which the other arm 110is pivotally connected with the upper end of a twisted link 111. Thelower end of the link 111 is pivoted to an arm 112 of a yolk 113 securedupon a transverse rock-shaft 114 journaled in suitable bearings providedtherefor at the under side of the cloth-plate 1. The yolk 113 has asocketed boss 115 in which is fixed a knee-shift lever 116 suitablyshaped to provide for convenient operation.

1 ciprocatin ing the spiral gear 60 to slightly travel across Therotation of the loop-taker is accelerated and retarded to compensate forthe needle vibration. To this end, an arm of the lever 82 has aball-joint connection with an ex tensible link'117 of which the lowerend has a similar connection with a horizontally directed arm 118 of abell-crank lever. This lever is suitably secured upon a short rockshaft119 journaled in an apertured lug 120 at the under side of thecloth-plate, said lever having anupwardly directed arm 121 connectedbymeans of a link 122 with the lateral pin 68 of the shifting sleeve 67.

In the operation of the machine, the rockshaft 78 imparts vibratorymovements to the needle-bar frame 18 upon the fulcrum-pin 19. Therock-shaft 78 is actuated by the cam 86 which imparts lateral vibratorymovements of uniform extent to the forked pitman-bar 84 about itspivotal connection with the lever 82. It is evident that when thepitman-bar fulcrum 96 intersects an imaginary line through the axis ofthe cam 86 and the pitman-bar connection with the lever 82, saidpitman-bar has no endwls'e movements and that as a result the needlereciprocates in a constant path. This zero position of the pitman-barfulcrum, in the present machine, corresponds with the extreme forwardpath of reciprocation of the needle and is obtained by swinging the arm108, of the rock-shaft 98 carrying the pitman-bar fulcrum, intoengagement with the upper segment-plate stop 104 when the latteroccupies its limit of upward movement in the segment-plate slot. Thelateral throw of the needle is therefore always in a direction rearwardof its zero position, i. e., of its position of reciprocation in aconstant path.

However, lateral vibrations of the pitmanbar 84 are resolved intoendwise movements thereof by shifting the fulcrum-pin 96 crosswise ofthe pitman bar 84, the endwise component of movement depending of courseupon the extent that the fulcrum-pin is shifted laterally. A selectedextent of throw or lateral vibration of the needle may be fixed bysecuring the arm 108 to the segment-plate 101 by means of the screw 109.By releasing sald screw 109, the extent of vibration of the needle maybe varied at will between limits determined by the positions of thestops 104, 106 and by manipulation of a knee-shift through the describedconnections.

As will be understood from the foregoing descri tion, any endwisemovement of the forke pitman-bar 84 will impart rocking movements to thelever 82, which movements are transmitted to the needle-vibratingrockshaft 78 through the link 81 and crank-arm 80. The rocking movementsof the lever 82 are also transmitted to the bell-crank lever 118, 121 bymeans of the link 117, thereby rethe sleeve 61 endwise and causthe faceof its driving gear 59, resulting in accelerated or retarded rotation ofthe looptaker dependent upon the direction of movement of the sleeve 61.

By circularly adjusting the bushing 99, the field of vibration of theneedle may be varied, because the rock-shaft 98 which is eccentricallyjournaled in said bushing is thereby carried laterally in a directioncrosswise of the pitman-bar 84. As any change in the field of vibrationof the needle is effected through the needle-frame vibratingconnections, it is apparent that the direction of the paths of endwisereciprocation of the needle is thereby altered. ln'order to compensatefor this change in the direction of the paths of needle-reciprocation,the fulcrum axis of the needle-frame 18 may be shifted by adjustment ofthe eccentric fulcrum-stud 19, 20. Preferably the adjustment of thisfulcrum-stud is employed for obtaining a substantially vertical path ofreciprocation of the needle in its zero position, i. e., in its positionof non-vibration, in any selected field of vibration.-

Vhile the present machine includes no work-feeding mechanism, it is tobe understood that the needle and loop-taker actuating mechanism hereindescribed is not limited to a machine in which the feed of the work ismanually effected, as it is obvious that any suitable feeding mechanismmight be employed to advance the work.

Having thus set forth the nature of the invention, what I claim hereinis:

1. In a sewing machine, areciprocatory needle-carrying bar, a rotaryactuating shaft, operative connections with said shaft for reciprocatingsaid bar, a laterally movable needle-bar frame, a support for saidframe, a rock-shaft disposed substantially parallel with said actuatingshaft, operative connections between the rock-shaft and said frame, apitman-bar, means for imparting lateral movements to said pitman-bar, aswinging link connected with said pitman-bar, a support for said linkshiftable into positions whereby lateral movements of the pitmanbar areresolved into endwise movements thereof, and operative connections withsaid pitman-bar for' transmitting the endwise movements thereof to saidrock-shaft.

2. In a sewing machine, a reciprocatory needle-carrying bar, a rotaryactuating shaft, operative connections with said shaft for reciprocatingsaid bar, a laterally movable needle-bar frame, a support for saidframe, a rock-shaft disposed substantially parallel with said actuatingshaft, operative connections between the rock-shaft and said frame, apitman-bar, means for imparting lateral movements to said pitman-bar, aswinging link connected with said pitman-bar, a crankarm' connected withsaid link, a support for said crank-arm permitting swingingmoveneedle-carrying bar, a rotary actuating shaft,

operative connections with said shaft for reciprocating said bar, alaterally movable needle-bar frame, a support for said frame, arock-shaft disposed substantially parallel with said actuating shaft,operative connections between the rock-shaft and said frame, a forkedpitman-bar, a cam engaging the fork of said pitman-bar, a swinglng linkconnected with said pitma-n-bar, a shift able fulcrum for said link, andoperative connections with the pitman-bar for transmitting rockingmovements to said rock-shaft.

4. In a sewing machine, a reciprocatory needle-carrying bar, means forreciprocating said bar, a laterally movable needle-bar frame, arock-shaft, operative connections between the rock-shaft and said frame,a pitman-bar, means for imparting uniform lateral movements to saidpitman-bar, a swinging link connected with said pitmanbar, a crank-armpivotally supporting said link, a pivotal support for the crank-arm,adjustable means for limiting the swinging movements of said crank-arm,treadle connections for swinging said cfank-arm' into positionsfavorable for resolution of lateral movements of said pitman-bar intoendwise movements thereof, and means for transmitting the endwisemovements of the pitmanbar to said rock-shaft.

5. In a sewing machine, a reciprocatory needle-carrying-bar, means forreciprocating said bar, a laterally movable needle-bar frame, aneedle-bar vibrating rock-shaft operatively connected with said frame, apitman-bar, means for imparting lateral movements to said pitman-bar, aswinging link connected with said pitman-bar, a crank-arm having apivotal connection With said link affording a fulcrum for saidpitman-bar, a crank-arm carrying rock-shaft, a stationary segment-plateprovided with a guide-slot, a stop adjustably shiftable in thesegmentplate slot, an arm carried by the crank-arm rock-shaft limited inits swinging movement in one directionby said stop, treadle connectionsfor swinging said crank-arm into posi tions limited by said stop wherebythe lateral movements of said pitman-bar are resolved into endwisemovements thereof, and means for transmitting the endwise movements ofthe pitman-bar to said needle-bar vibrating rock-shaft.

6. In a sewing machine, an endwise reciprocatory and laterally vibratoryneedle-carrying bar, means for reciprocating said needle-bar, a forkedpitman-bar, a rotary cam for laterally vibrating said pitman-bar, aswinging link connected with said pitmanbar, a crank-arm pivotallysupporting said link, a rock-shaft carrying said crank-arm, a bushinghaving a bearing aperture eccentric to its periphery in which saidrockshaft is journaled, a segment-plate carrried by said bushing, spacedstops adjustably secured upon said segment-plate, a stop-arm carried bysaid rock-shaft having a range of movement limited by said stops, meansfor adjustably securing said stop-arm to said se ment-plat-e, means forshi tin said oran arm in the released condition 0 the stop-arm toresolve lateral movements of said pitmanbar into endwise reciprocatorymovements, operative connections for laterally vibrating the needle-barby the endwise movements of the pitman-bar, and means permitting advjustment of said bushing to bodily shift said crank-arm rock-shaft andthereby change the field of vibration of the needle.

7. In a sewing machine, the combination with stitch-forming mechanismcomprising a needle, an endwise reciprocatory and laterally vibratoryneedle-bar carrying said needle, a needle-bar frame, means forreciprocating said needle-bar, a lever supported for rocking movementsupon an axis transverse to the path of needle endwise reciprocation, apitman-bar pivotally connected with said lever, means for vibrating saidpitman-bar about its pivotal connection with the lever, a swinging linkconnected with said pitmanbar, a fulcrum for said link shiftablecrosswise of said pitman-bar into positions favorable for resolution oflateral movements of the pitman-bar into endwise reciprocations thereof,and operative connections for transmitting endwise movements of saidpitmanbar from the lever to said needle-bar frame.

8. In a sewing machine, an endwise reciprocatory and laterally vibratoryneedle-bar, means for reciprocating said needle-bar, a needle-barvibrating rock-shaft, a pitmanbar, means for imparting uniform lateralmovements to said pitman-bar, a link pivotally connected with saidpitman-bar, a crank-arm pivotally connected with said link, crank-armsupporting means, means for swinging said crank-arm into positionsfavorable for resolution of lateral movements of said pitman-bar intoendwise movements thereof, operative connections with said pitman-barfor transmitting its endwise movements to the needle-vibratingrock-shaft, and adjustable means for bodily shifting said crank-armsupporting means to thereby change the field of vibration of theneedle-bar.

9. In a sewing machine, an endwise reciprocatory and laterally vibratoryneedle-bar,

means for reciprocating said needlebar, a needle-bar vibratingrock-shaft a p tmanbar, means for laterally vibrating said pitman-bar, alink pivotally connected with said pitinan-bar, a crank-arm pivotal lycon-* nected with said link, a crank-arm supporting rock-shaft; meansfor swinging said crank-arm into positions favorable for resolution oflateral vibrations ofsaid pitmanbar into endwise movements thereof,operative connections with said pitman-bar for transmitting its endwisemoveinents to the needle-vibrating rock-shaft, a bushing providing ari'eccentric journal for the crankarm supporting rock-shaft, and meanspermitting adjustment of said bushing to bodilyshift the rock-shaftjournaled therein and thereby change the field of vibration of theneedle-bar. 7

10. In a sewing machine, the combination with stitchgforming mechanismcomprising a needle, an endwise reciprocatory and laterall" vibratory.needle-bar carrying said needle, means for reciprocating said needlebar,a cooperating loop-taker, and actuating means for said loep-taker, of alaterally movable needle-bar frame, a two-armed lever, a'pitman-barpivotally connected with one arm of saidlever, operative connectionsvbetween the-other arm of said lever and the needle bar frame, means forimparting to said pitman-bar uniform lateral movements about its pivotof which one in each direc tion is effected for every completereciprocation of the needle, a swinging link pivotally iconnected tosaid causing endwise reciprocations of said pitman-bar by the lateralmovements thereof to thereby rock said lever, and operative connectionsbetween said lever and the looptaker actuating means for compensatingthe loop-taker movements in accordance rwith the extent of lateralvibrations of the needle 11. In a sewing machine having a clothplate anda bracket-arm overhanging the cloth-plate, the combination with anactuating shaft, a needle-carrying bar eperatively connected with saidshaft to derive endwise reciprocations therefrom,;a loop-taker, and arotary loop-taker actuating shaft, of a lateraliy movable needle-barframe, a rock shaft disposed lengthwise of said bracketa-rm, operativeconnections between the rockshaft and said needle-bar frame, a two-armedlever, operative connections between one arm of said lever and said rockshaft, a pitmanbar pivotally connected with the other arm of said lever,means for imparting lateral vibratory movements to said pitman-bar aboutits pivotal connectionwith said twoarmedlever, a swingin link connectedwith Silld prtman-bar, a cran -arm connected with said nk, means forswinging said crank-arm into positions favorable-for resolution of lat-,eral movements of the pitman-bar into endwise movements thereof, abell-crank lever, a link connection between the bell-crank leverpitman-bar, supporting means for said link shiftable into positions" andsaid two-armed lever, a sleeve shiftable lengthwise upon and rotatablewith said looptaker actuatln -shaft, a spiral driven-gear carried bysaid sleeve, a spiral driving-gear in mesh with said driven gear, andoperative connections between said bell-crank lever and the shiftablesleeve for carrying said driven gear across the face of its driving gearand thereby accelerating and retarding the rotations of the loop-taker.

1 12. In a sewing machine, a needle, actuating mechanism forreciprocating said needle, actuating mechanism for laterally vibratingsaid needle, a loop-taker cooperating with said needle, a rotaryloop-taker carrying shaft fixed against endwise movement, a sleeveslidable endwise upon and rotating with said shaft, a driven spiral-gearcarried by'said sleeve, a driving spiral-gear in mesh with said drivengear, and operative connections between said sleeve and the needlevibrating-mechanism for reciprocating said sleeve to carry the drivenspiral gear across the face of its driving gear and thereby accelerateand retard the rotations of the looptaker in accordance with the extentand direction of lateral vibration of the needle.

13. In a sewing machine having a clothplate and a bracket-armoverhanging the,

cloth -plate, a rotary actuating shaft journaled in saidibracket -arm, aneedle-carrying bar, means for reciprocating the needle-bar from saidshaft, actuating 'mechar ism for laterally vibrating said needle-bar; aloop'= taker, a rotary: shaft carrying said loop-taker fixed againstendwise movement, a sleeve slidable endwise upon and rotatable with theloop-taker carrying shaft, a driven gear member carried by said sleeve,a driving gear-member in mesh with said driven gearmember, a verticallydirected intermediate shaft carrying said drivin gear, connections forrotating said intermedlate shaft from the actuating shaft journaled insaid bracketarm, and operative connections with the needle-vibratingmechanism for reciprocating said sleeve to carry said driven gearmemberacross the face of its driving gearmember to thereby efi'ectacceleration and retardation of the sloop-taker in accordance with theextent and direction of lateral vibration of the needle.

14. In a sewing'machine, a needle-bar, a swinging frame in which ,saidneedle-bar is journaled for endwise reciprocation, actuating mechanismoperatively connected with said framefor imparting swinging movementsthereto, and a support providing a pivotal axis for said frame disposedsubstantially transverse to the needle-bar and shiftable independentlyof the frame-swinging connections for adjustably determining thedirection of the aths of endwise reciprocation of the needlear.

15. In a sewing machine, a needle-bar, a

swinging frame in Which said needle-bar is journaled for endwisereciprocation, actuating mechanism operatively connected with said framefor imparting swinging movements thereto, a support providing a pivotalaxis for said frame substantially transverse to the needle-bar andshiftable independently of the frame-swinging connections for adjustablydetermining the direction of the paths of endwise reciprocation of theneedlebar in any selected field of vibration of said needle-bar, andmeans for adjustably determining the field of lateral vibration of theneedle-bar.

In testimony whereof, I have signed my name to this specification.

GEORGE M. EAMES.

